list-objects.c

   1 #include "cache.h"
   2 #include "tag.h"
   3 #include "commit.h"
   4 #include "hex.h"
   5 #include "tree.h"
   6 #include "blob.h"
   7 #include "diff.h"
   8 #include "tree-walk.h"
   9 #include "revision.h"
  10 #include "list-objects.h"
  11 #include "list-objects-filter.h"
  12 #include "list-objects-filter-options.h"
  13 #include "packfile.h"
  14 #include "object-store.h"
  15 #include "trace.h"
  16
  17 struct traversal_context {
  18         struct rev_info *revs;
  19         show_object_fn show_object;
  20         show_commit_fn show_commit;
  21         void *show_data;
  22         struct filter *filter;
  23 };
  24
  25 static void show_commit(struct traversal_context *ctx,
  26                         struct commit *commit)
  27 {
  28         if (!ctx->show_commit)
  29                 return;
  30         ctx->show_commit(commit, ctx->show_data);
  31 }
  32
  33 static void show_object(struct traversal_context *ctx,
  34                         struct object *object,
  35                         const char *name)
  36 {
  37         if (!ctx->show_object)
  38                 return;
  39         ctx->show_object(object, name, ctx->show_data);
  40 }
  41
  42 static void process_blob(struct traversal_context *ctx,
  43                          struct blob *blob,
  44                          struct strbuf *path,
  45                          const char *name)
  46 {
  47         struct object *obj = &blob->object;
  48         size_t pathlen;
  49         enum list_objects_filter_result r;
  50
  51         if (!ctx->revs->blob_objects)
  52                 return;
  53         if (!obj)
  54                 die("bad blob object");
  55         if (obj->flags & (UNINTERESTING | SEEN))
  56                 return;
  57
  58         /*
  59          * Pre-filter known-missing objects when explicitly requested.
  60          * Otherwise, a missing object error message may be reported
  61          * later (depending on other filtering criteria).
  62          *
  63          * Note that this "--exclude-promisor-objects" pre-filtering
  64          * may cause the actual filter to report an incomplete list
  65          * of missing objects.
  66          */
  67         if (ctx->revs->exclude_promisor_objects &&
  68             !has_object_file(&obj->oid) &&
  69             is_promisor_object(&obj->oid))
  70                 return;
  71
  72         pathlen = path->len;
  73         strbuf_addstr(path, name);
  74         r = list_objects_filter__filter_object(ctx->revs->repo,
  75                                                LOFS_BLOB, obj,
  76                                                path->buf, &path->buf[pathlen],
  77                                                ctx->filter);
  78         if (r & LOFR_MARK_SEEN)
  79                 obj->flags |= SEEN;
  80         if (r & LOFR_DO_SHOW)
  81                 show_object(ctx, obj, path->buf);
  82         strbuf_setlen(path, pathlen);
  83 }
  84
  85 static void process_tree(struct traversal_context *ctx,
  86                          struct tree *tree,
  87                          struct strbuf *base,
  88                          const char *name);
  89
  90 static void process_tree_contents(struct traversal_context *ctx,
  91                                   struct tree *tree,
  92                                   struct strbuf *base)
  93 {
  94         struct tree_desc desc;
  95         struct name_entry entry;
  96         enum interesting match = ctx->revs->diffopt.pathspec.nr == 0 ?
  97                 all_entries_interesting : entry_not_interesting;
  98
  99         init_tree_desc(&desc, tree->buffer, tree->size);
 100
 101         while (tree_entry(&desc, &entry)) {
 102                 if (match != all_entries_interesting) {
 103                         match = tree_entry_interesting(ctx->revs->repo->index,
 104                                                        &entry, base, 0,
 105                                                        &ctx->revs->diffopt.pathspec);
 106                         if (match == all_entries_not_interesting)
 107                                 break;
 108                         if (match == entry_not_interesting)
 109                                 continue;
 110                 }
 111
 112                 if (S_ISDIR(entry.mode)) {
 113                         struct tree *t = lookup_tree(ctx->revs->repo, &entry.oid);
 114                         if (!t) {
 115                                 die(_("entry '%s' in tree %s has tree mode, "
 116                                       "but is not a tree"),
 117                                     entry.path, oid_to_hex(&tree->object.oid));
 118                         }
 119                         t->object.flags |= NOT_USER_GIVEN;
 120                         process_tree(ctx, t, base, entry.path);
 121                 }
 122                 else if (S_ISGITLINK(entry.mode))
 123                         ; /* ignore gitlink */
 124                 else {
 125                         struct blob *b = lookup_blob(ctx->revs->repo, &entry.oid);
 126                         if (!b) {
 127                                 die(_("entry '%s' in tree %s has blob mode, "
 128                                       "but is not a blob"),
 129                                     entry.path, oid_to_hex(&tree->object.oid));
 130                         }
 131                         b->object.flags |= NOT_USER_GIVEN;
 132                         process_blob(ctx, b, base, entry.path);
 133                 }
 134         }
 135 }
 136
 137 static void process_tree(struct traversal_context *ctx,
 138                          struct tree *tree,
 139                          struct strbuf *base,
 140                          const char *name)
 141 {
 142         struct object *obj = &tree->object;
 143         struct rev_info *revs = ctx->revs;
 144         int baselen = base->len;
 145         enum list_objects_filter_result r;
 146         int failed_parse;
 147
 148         if (!revs->tree_objects)
 149                 return;
 150         if (!obj)
 151                 die("bad tree object");
 152         if (obj->flags & (UNINTERESTING | SEEN))
 153                 return;
 154         if (revs->include_check_obj &&
 155             !revs->include_check_obj(&tree->object, revs->include_check_data))
 156                 return;
 157
 158         failed_parse = parse_tree_gently(tree, 1);
 159         if (failed_parse) {
 160                 if (revs->ignore_missing_links)
 161                         return;
 162
 163                 /*
 164                  * Pre-filter known-missing tree objects when explicitly
 165                  * requested.  This may cause the actual filter to report
 166                  * an incomplete list of missing objects.
 167                  */
 168                 if (revs->exclude_promisor_objects &&
 169                     is_promisor_object(&obj->oid))
 170                         return;
 171
 172                 if (!revs->do_not_die_on_missing_tree)
 173                         die("bad tree object %s", oid_to_hex(&obj->oid));
 174         }
 175
 176         strbuf_addstr(base, name);
 177         r = list_objects_filter__filter_object(ctx->revs->repo,
 178                                                LOFS_BEGIN_TREE, obj,
 179                                                base->buf, &base->buf[baselen],
 180                                                ctx->filter);
 181         if (r & LOFR_MARK_SEEN)
 182                 obj->flags |= SEEN;
 183         if (r & LOFR_DO_SHOW)
 184                 show_object(ctx, obj, base->buf);
 185         if (base->len)
 186                 strbuf_addch(base, '/');
 187
 188         if (r & LOFR_SKIP_TREE)
 189                 trace_printf("Skipping contents of tree %s...\n", base->buf);
 190         else if (!failed_parse)
 191                 process_tree_contents(ctx, tree, base);
 192
 193         r = list_objects_filter__filter_object(ctx->revs->repo,
 194                                                LOFS_END_TREE, obj,
 195                                                base->buf, &base->buf[baselen],
 196                                                ctx->filter);
 197         if (r & LOFR_MARK_SEEN)
 198                 obj->flags |= SEEN;
 199         if (r & LOFR_DO_SHOW)
 200                 show_object(ctx, obj, base->buf);
 201
 202         strbuf_setlen(base, baselen);
 203         free_tree_buffer(tree);
 204 }
 205
 206 static void process_tag(struct traversal_context *ctx,
 207                         struct tag *tag,
 208                         const char *name)
 209 {
 210         enum list_objects_filter_result r;
 211
 212         r = list_objects_filter__filter_object(ctx->revs->repo, LOFS_TAG,
 213                                                &tag->object, NULL, NULL,
 214                                                ctx->filter);
 215         if (r & LOFR_MARK_SEEN)
 216                 tag->object.flags |= SEEN;
 217         if (r & LOFR_DO_SHOW)
 218                 show_object(ctx, &tag->object, name);
 219 }
 220
 221 static void mark_edge_parents_uninteresting(struct commit *commit,
 222                                             struct rev_info *revs,
 223                                             show_edge_fn show_edge)
 224 {
 225         struct commit_list *parents;
 226
 227         for (parents = commit->parents; parents; parents = parents->next) {
 228                 struct commit *parent = parents->item;
 229                 if (!(parent->object.flags & UNINTERESTING))
 230                         continue;
 231                 mark_tree_uninteresting(revs->repo, get_commit_tree(parent));
 232                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 233                         parent->object.flags |= SHOWN;
 234                         show_edge(parent);
 235                 }
 236         }
 237 }
 238
 239 static void add_edge_parents(struct commit *commit,
 240                              struct rev_info *revs,
 241                              show_edge_fn show_edge,
 242                              struct oidset *set)
 243 {
 244         struct commit_list *parents;
 245
 246         for (parents = commit->parents; parents; parents = parents->next) {
 247                 struct commit *parent = parents->item;
 248                 struct tree *tree = get_commit_tree(parent);
 249
 250                 if (!tree)
 251                         continue;
 252
 253                 oidset_insert(set, &tree->object.oid);
 254
 255                 if (!(parent->object.flags & UNINTERESTING))
 256                         continue;
 257                 tree->object.flags |= UNINTERESTING;
 258
 259                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
 260                         parent->object.flags |= SHOWN;
 261                         show_edge(parent);
 262                 }
 263         }
 264 }
 265
 266 void mark_edges_uninteresting(struct rev_info *revs,
 267                               show_edge_fn show_edge,
 268                               int sparse)
 269 {
 270         struct commit_list *list;
 271         int i;
 272
 273         if (sparse) {
 274                 struct oidset set;
 275                 oidset_init(&set, 16);
 276
 277                 for (list = revs->commits; list; list = list->next) {
 278                         struct commit *commit = list->item;
 279                         struct tree *tree = get_commit_tree(commit);
 280
 281                         if (commit->object.flags & UNINTERESTING)
 282                                 tree->object.flags |= UNINTERESTING;
 283
 284                         oidset_insert(&set, &tree->object.oid);
 285                         add_edge_parents(commit, revs, show_edge, &set);
 286                 }
 287
 288                 mark_trees_uninteresting_sparse(revs->repo, &set);
 289                 oidset_clear(&set);
 290         } else {
 291                 for (list = revs->commits; list; list = list->next) {
 292                         struct commit *commit = list->item;
 293                         if (commit->object.flags & UNINTERESTING) {
 294                                 mark_tree_uninteresting(revs->repo,
 295                                                         get_commit_tree(commit));
 296                                 if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
 297                                         commit->object.flags |= SHOWN;
 298                                         show_edge(commit);
 299                                 }
 300                                 continue;
 301                         }
 302                         mark_edge_parents_uninteresting(commit, revs, show_edge);
 303                 }
 304         }
 305
 306         if (revs->edge_hint_aggressive) {
 307                 for (i = 0; i < revs->cmdline.nr; i++) {
 308                         struct object *obj = revs->cmdline.rev[i].item;
 309                         struct commit *commit = (struct commit *)obj;
 310                         if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
 311                                 continue;
 312                         mark_tree_uninteresting(revs->repo,
 313                                                 get_commit_tree(commit));
 314                         if (!(obj->flags & SHOWN)) {
 315                                 obj->flags |= SHOWN;
 316                                 show_edge(commit);
 317                         }
 318                 }
 319         }
 320 }
 321
 322 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
 323 {
 324         add_pending_object(revs, &tree->object, "");
 325 }
 326
 327 static void traverse_non_commits(struct traversal_context *ctx,
 328                                  struct strbuf *base)
 329 {
 330         int i;
 331
 332         assert(base->len == 0);
 333
 334         for (i = 0; i < ctx->revs->pending.nr; i++) {
 335                 struct object_array_entry *pending = ctx->revs->pending.objects + i;
 336                 struct object *obj = pending->item;
 337                 const char *name = pending->name;
 338                 const char *path = pending->path;
 339                 if (obj->flags & (UNINTERESTING | SEEN))
 340                         continue;
 341                 if (obj->type == OBJ_TAG) {
 342                         process_tag(ctx, (struct tag *)obj, name);
 343                         continue;
 344                 }
 345                 if (!path)
 346                         path = "";
 347                 if (obj->type == OBJ_TREE) {
 348                         process_tree(ctx, (struct tree *)obj, base, path);
 349                         continue;
 350                 }
 351                 if (obj->type == OBJ_BLOB) {
 352                         process_blob(ctx, (struct blob *)obj, base, path);
 353                         continue;
 354                 }
 355                 die("unknown pending object %s (%s)",
 356                     oid_to_hex(&obj->oid), name);
 357         }
 358         object_array_clear(&ctx->revs->pending);
 359 }
 360
 361 static void do_traverse(struct traversal_context *ctx)
 362 {
 363         struct commit *commit;
 364         struct strbuf csp; /* callee's scratch pad */
 365         strbuf_init(&csp, PATH_MAX);
 366
 367         while ((commit = get_revision(ctx->revs)) != NULL) {
 368                 enum list_objects_filter_result r;
 369
 370                 r = list_objects_filter__filter_object(ctx->revs->repo,
 371                                 LOFS_COMMIT, &commit->object,
 372                                 NULL, NULL, ctx->filter);
 373
 374                 /*
 375                  * an uninteresting boundary commit may not have its tree
 376                  * parsed yet, but we are not going to show them anyway
 377                  */
 378                 if (!ctx->revs->tree_objects)
 379                         ; /* do not bother loading tree */
 380                 else if (get_commit_tree(commit)) {
 381                         struct tree *tree = get_commit_tree(commit);
 382                         tree->object.flags |= NOT_USER_GIVEN;
 383                         add_pending_tree(ctx->revs, tree);
 384                 } else if (commit->object.parsed) {
 385                         die(_("unable to load root tree for commit %s"),
 386                               oid_to_hex(&commit->object.oid));
 387                 }
 388
 389                 if (r & LOFR_MARK_SEEN)
 390                         commit->object.flags |= SEEN;
 391                 if (r & LOFR_DO_SHOW)
 392                         show_commit(ctx, commit);
 393
 394                 if (ctx->revs->tree_blobs_in_commit_order)
 395                         /*
 396                          * NEEDSWORK: Adding the tree and then flushing it here
 397                          * needs a reallocation for each commit. Can we pass the
 398                          * tree directory without allocation churn?
 399                          */
 400                         traverse_non_commits(ctx, &csp);
 401         }
 402         traverse_non_commits(ctx, &csp);
 403         strbuf_release(&csp);
 404 }
 405
 406 void traverse_commit_list_filtered(
 407         struct rev_info *revs,
 408         show_commit_fn show_commit,
 409         show_object_fn show_object,
 410         void *show_data,
 411         struct oidset *omitted)
 412 {
 413         struct traversal_context ctx = {
 414                 .revs = revs,
 415                 .show_object = show_object,
 416                 .show_commit = show_commit,
 417                 .show_data = show_data,
 418         };
 419
 420         if (revs->filter.choice)
 421                 ctx.filter = list_objects_filter__init(omitted, &revs->filter);
 422
 423         do_traverse(&ctx);
 424
 425         if (ctx.filter)
 426                 list_objects_filter__free(ctx.filter);
 427 }